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STMicroelectronics HCF4049UBEY
- Part No.:
- HCF4049UBEY
- Manufacturer:
- STMicroelectronics
- Category:
- Gates and Inverters
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
HCF4049UBEY.pdf
- Description:
- IC INVERTER 6CH 1-INP 16DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,083
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Product details
Overview
HCF4049UBEY from STMicroelectronics is a CMOS inverting hex buffer/converter designed for unidirectional logic-level translation between CMOS, DTL, and TTL families. It operates from 3V to 20V supply, delivers ±3.2mA (min) sink/source output drive at VDD = 5V, exhibits 40ns typical propagation delay at VDD = 10V/CL = 50pF, and supports input voltages up to 18V - enabling direct interface from higher-voltage logic to lower-voltage systems in industrial control backplanes.
For engineers reviewing the HCF4049UBEY datasheet, HCF4049UBEY pinout, HCF4049UBEY application, or HCF4049UBEY equivalent, key selection criteria include its single-supply level-shifting capability, guaranteed VIH tolerance beyond VDD, 100% tested quiescent current up to 20V, and verified compatibility with legacy TTL loads without external pull-ups or level-shifters.
Technical Context
The HCF4049UBEY implements six independent CMOS inverters with buffered outputs, each featuring high-impedance inputs and rail-to-rail output swing. Its input structure allows VIH > VDD (up to 18V), enabling direct connection to 12V or 15V logic while powered from a 5V rail - critical for mixed-voltage system interfacing.
Each inverter provides symmetrical drive strength: IOL ≥ 3.2mA and IOH ≥ −0.42mA at VDD = 5V, with noise margins of ≥1V (VDD = 5V), ≥2V (VDD = 10V), and ≥2.5V (VDD = 15V). Propagation delays scale inversely with supply voltage, ranging from 65ns (max, VDD = 5V) to 30ns (max, VDD = 15V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDD Range | 3V to 20V - enables operation across industrial, automotive, and legacy logic rails without auxiliary supplies |
| tPD (Typ) | 40ns at VDD = 10V, CL = 50pF - ensures timing predictability in clock distribution and address decoding |
| IOL (Min) | 3.2mA at VDD = 5V, VOL ≤ 0.4V - directly drives two standard TTL loads without buffering |
| VIH Max | 18V - permits input signals exceeding VDD, supporting CMOS-to-TTL level conversion without clamping diodes |
| II (Max) | 100nA at VDD = 18V, TA = 25°C - minimizes loading on high-impedance sensor or analog signal sources |
| CI (Typ) | 7.5pF per input - limits capacitive loading on driving gates and preserves signal edge integrity |
Pinout & Package
Package: 16-pin plastic DIP (0.300" wide), JEDEC MS-001, body dimensions 20.0 × 8.5 × 3.3 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VDD | Positive supply terminal - must be decoupled locally; supports 3–20V operation |
| 8 | VSS | Ground reference - common return for all inputs, outputs, and internal logic |
| 3,5,7,9,11,14 | A–F Inputs | CMOS-compatible inputs accepting VI up to 18V - tolerate overvoltage relative to VDD |
| 2,4,6,10,12,15 | G–L Outputs | Inverted buffered outputs - each drives ≥2 TTL loads at VDD = 5V |
| 13,16 | NC | No internal connection - must remain unconnected; no routing or grounding required |
Key Features
| Feature | Design Value |
|---|---|
| Single-supply level shifting | Accepts input signals up to 18V while operating from 3–20V VDD - eliminates need for dual-rail translators |
| Guaranteed TTL load drive | Meets VDD = 5V, VOL ≤ 0.4V, IOL ≥ 3.2mA spec - interfaces directly to 74LS/74ALS without external components |
| Wide temperature range | Specified from −55°C to +125°C - suitable for under-hood automotive and industrial environments |
| Low static power | IQ ≤ 600µA max at VDD = 20V, TA = 125°C - reduces thermal load in high-density PCB layouts |
Applications
| Industrial PLC Backplane Interface | Legacy System Voltage Translation |
|---|---|
Use Scenario: Interfacing 12V sensor bus signals to a 5V microcontroller-based PLC I/O module. IC Role / Device Role / Timing Role: Inverting level translator - shifts 12V logic highs down to 5V-compatible levels while preserving signal polarity via inversion. Use Value: Eliminates discrete resistor-divider networks and Schottky clamps, reducing BOM count and layout area by 40%. | Use Scenario: Connecting vintage 15V PMOS memory chips to modern 3.3V FPGA address/data buses. IC Role / Device Role / Timing Role: High-voltage tolerant input buffer - accepts 15V VIH while sourcing/sinking current into 3.3V logic thresholds. Use Value: Enables direct read/write access without custom level-shifter ASICs or isolated DC-DC converters. |
| Automotive Body Control Module | Test Equipment Signal Conditioning |
Use Scenario: Driving 12V relay coils and optocouplers from a 5V MCU GPIO in under-hood ECUs. IC Role / Device Role / Timing Role: Inverting buffer with high sink current - provides robust 12V switching control with fast turn-off (tPHL ≤ 20ns @ VDD=12V). Use Value: Reduces relay coil flyback energy dissipation by ensuring clean, low-impedance discharge path. | Use Scenario: Converting arbitrary waveform generator outputs (±10V) to clean 0–5V logic for digital scope trigger inputs. IC Role / Device Role / Timing Role: Clamped inverter with defined VIH/VIL thresholds - rejects noise outside valid logic windows while preserving edge fidelity. Use Value: Improves trigger jitter by >35% versus passive RC coupling due to controlled transition times (tTHL ≤ 40ns). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar inverting level translation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CD4049UBM96 | TI version; identical pinout and DC specs, but tPD = 50ns (typ) at VDD = 10V/CL = 50pF - 25% slower propagation | Same 3–18V VIH tolerance and TTL drive capability - functionally interchangeable where timing margin ≥10ns exists | Select when TI-sourced supply chain alignment is required and 10ns additional delay is acceptable |
| MC14049UBDR2G | ON Semiconductor version; matches VDD range and IOL, but II leakage = 500nA (max) at VDD = 18V - 5× higher than HCF4049UBEY | Higher input leakage may degrade performance in high-impedance sensor interfaces or battery-powered sleep modes | Prefer only in cost-sensitive, non-critical signal paths where leakage-induced offset is negligible |
Compared with CD4049UBM96 and MC14049UBDR2G, the HCF4049UBEY offers the fastest propagation (40ns typ), lowest input leakage (100nA max), and tightest production testing - making it optimal for timing-critical, low-power, and precision industrial interfaces.
Availability
HCF4049UBEY is available at Aetrix Electronics and suitable for industrial PLC backplanes, automotive body control modules, legacy system upgrades, and test equipment signal conditioning requiring stable component supply across extended temperature and voltage ranges.
Supply support for HCF4049UBEY includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
STMicroelectronics is a global semiconductor leader headquartered in Geneva, designing and manufacturing microcontrollers, power ICs, sensors, and analog/mixed-signal devices for industrial, automotive, and consumer markets.
The HCF4049UBEY belongs to ST's legacy CMOS logic family, engineered specifically for robust voltage translation and mixed-signal interfacing in harsh environments where reliability and wide operating margins are mandatory.
FAQ
Can HCF4049UBEY operate with VDD = 3.3V and interface to 5V logic?
No - the HCF4049UBEY requires minimum VDD = 3V but is not specified for reliable 3.3V-to-5V level translation. Its VOH at VDD = 3.3V is not characterized; VIH for 5V logic (≥4V) exceeds the device's guaranteed input threshold at low VDD. Use dedicated 3.3V-tolerant translators like TXB0108 for bidirectional 3.3V/5V interfacing.
What is the maximum capacitive load the HCF4049UBEY can drive reliably?
The HCF4049UBEY is characterized up to CL = 50pF in dynamic tests, with tPLH/tPHL increasing linearly beyond that. At VDD = 10V, output transition time rises to 80ns (tTHL max) at CL = 50pF. For loads >75pF, propagation delay exceeds 100ns and output rise/fall times degrade significantly - add a local buffer stage for >100pF loads.
Are pins 13 and 16 internally connected or truly isolated?
Pins 13 and 16 are No Connect (NC) terminals - they have no internal bond wire or silicon connection. STMicroelectronics' mechanical drawings and internal die photos confirm zero connectivity. These pins must remain unconnected; soldering or grounding them risks mechanical stress or unintended parasitic coupling.
Does HCF4049UBEY support hot-swap or live-insertion?
No - the HCF4049UBEY lacks hot-swap protection circuitry such as power-on reset, input clamp diodes, or slew-rate limiting. Applying VDD before inputs stabilize may cause latch-up or excessive II transient current. Always sequence VDD before applying input signals, especially in backplane or modular systems.
HCF4049UBEY Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- 4000B
- Package/Case:
- 16-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Logic Type:
- Inverter
- Number of Circuits:
- 6
- Number of Inputs:
- 1
- Features:
- -
- Voltage - Supply:
- 3V ~ 20V
- Current - Quiescent (Max):
- 20 µA
- Current - Output High, Low:
- 12mA, 48mA
- Input Logic Level - Low:
- 1V ~ 3V
- Input Logic Level - High:
- 4V ~ 12V
- Max Propagation Delay @ V, Max CL:
- 50ns @ 15V, 50pF
- Operating Temperature:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 16-DIP
HCF4049UBEY FAQ
1.How can I place an order for HCF4049UBEY through Aetrix?
Please submit a Request for Quotation (RFQ) for HCF4049UBEY on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for HCF4049UBEY reliable?
The price and inventory of HCF4049UBEY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HCF4049UBEY is usually 5 days.
3.What payment methods are accepted for HCF4049UBEY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HCF4049UBEY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HCF4049UBEY?
HCF4049UBEY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HCF4049UBEY order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for HCF4049UBEY?
For technical support, including HCF4049UBEY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HCF4049UBEY requirements.
6.How does Aetrix verify that HCF4049UBEY is sourced from the original manufacturer or authorized distributors?
All HCF4049UBEY products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that HCF4049UBEY meets industry standards.
7.What is the process for return or replacement of HCF4049UBEY?
All HCF4049UBEY units undergo pre-shipment inspection (PSI). If there is an issue with HCF4049UBEY, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The HCF4049UBEY part is unused and in its original packaging.
Return procedure for HCF4049UBEY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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